These pillowcases are woven with a unique Japanese weaving technique. The material is soft and comfortable for sleeping. The binchotan and persimmon variations are also infused with binchotan charcoal and natural persimmon juice to ensure that your pillowcase stays fresher for longer periods of time. Product Details: - Dimensions: 18 x 26 inches - Materials: Natural Binchotan (65% Rayon, 35% Cotton), Natural Persimmon (70% Cotton, 30% Rayon), Natural Linen (50% Cotton, 50% Linen) - Number of layers: 4 - Unique weave is not found outside of Japan - Dries quickly after use *Please avoid contact with bleach and do not put in dryer